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https://issues.apache.org/jira/browse/HDFS-3300?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Brandon Li reassigned HDFS-3300:
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Assignee: Brandon Li
> stream the edit segments to NameNode when NameNode starts up
> ------------------------------------------------------------
>
> Key: HDFS-3300
> URL: https://issues.apache.org/jira/browse/HDFS-3300
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha, name-node
> Reporter: Brandon Li
> Assignee: Brandon Li
>
> Edit logs are saved on Journal daemon. When NameNode starts, it loads the
> latest image file and then streams the edit logs from an active Journal
> daemon.
> Currently we are using http to transfer edit files between two journal
> daemons/nodes or between a journal daemon and a NameNode. To get edit file
> from Journal daemon, the NameNode has to download it first and then read it
> from the disk.
> To avoid the slow start-up time, NameNode should be enhance to read the http
> data stream and update its in memory name space instead of saving the
> streamed data on disk first.
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